{"dataType": "CVE_RECORD", "cveMetadata": {"cveId": "CVE-2024-26644", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-19T14:20:24.138Z", "datePublished": "2024-03-26T15:17:17.614Z", "dateUpdated": "2024-12-19T08:44:12.208Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:44:12.208Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n BTRFS: Transaction aborted (error -2)\n WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n Call Trace:\n <TASK>\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? __warn+0x81/0x130\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? report_bug+0x171/0x1a0\n ? handle_bug+0x3a/0x70\n ? exc_invalid_op+0x17/0x70\n ? asm_exc_invalid_op+0x1a/0x20\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n create_pending_snapshots+0x92/0xc0 [btrfs]\n btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n btrfs_mksubvol+0x301/0x4d0 [btrfs]\n btrfs_mksnapshot+0x80/0xb0 [btrfs]\n __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n btrfs_ioctl+0x8a6/0x2650 [btrfs]\n ? kmem_cache_free+0x22/0x340\n ? do_sys_openat2+0x97/0xe0\n __x64_sys_ioctl+0x97/0xd0\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n RIP: 0033:0x7fe20abe83af\n RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n </TASK>\n ---[ end trace 0000000000000000 ]---\n BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n BTRFS info (device vdc: state EA): forced readonly\n BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root's refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/ioctl.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2bdf872bcfe629a6202ffd6641615a8ed00e8464", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0877497dc97834728e1b528ddf1e1c484292c29c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6e6bca99e8d88d989a7cde4c064abea552d5219b", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ec794a7528199e1be6d47bec03f4755aa75df256", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7081929ab2572920e94d70be3d332e5c9f97095a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/ioctl.c"], "versions": [{"version": "5.10.210", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.149", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.76", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.15", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.7.3", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.8", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "references": [{"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"}, {"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"}], "title": "btrfs: don't abort filesystem when attempting to snapshot deleted subvolume", "x_generator": {"engine": "bippy-5f407fcff5a0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-06-21T16:07:39.514220Z", "id": "CVE-2024-26644", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-21T16:07:49.207Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:07:19.716Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["x_transferred"]}]}]}, "dataVersion": "5.1"}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a", "tags": ["x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["x_transferred"]}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:07:19.716Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-26644", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-06-21T16:07:39.514220Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-21T16:07:44.638Z"}}], "cna": {"title": "btrfs: don't abort filesystem when attempting to snapshot deleted subvolume", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2bdf872bcfe629a6202ffd6641615a8ed00e8464", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0877497dc97834728e1b528ddf1e1c484292c29c", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6e6bca99e8d88d989a7cde4c064abea552d5219b", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ec794a7528199e1be6d47bec03f4755aa75df256", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "versionType": "git"}, {"status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7081929ab2572920e94d70be3d332e5c9f97095a", "versionType": "git"}], "programFiles": ["fs/btrfs/ioctl.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "unaffected", "version": "5.10.210", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.149", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.76", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.15", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.7.3", "versionType": "semver", "lessThanOrEqual": "6.7.*"}, {"status": "unaffected", "version": "6.8", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/btrfs/ioctl.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"}, {"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"}], "x_generator": {"engine": "bippy-5f407fcff5a0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n BTRFS: Transaction aborted (error -2)\n WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n Call Trace:\n <TASK>\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? __warn+0x81/0x130\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? report_bug+0x171/0x1a0\n ? handle_bug+0x3a/0x70\n ? exc_invalid_op+0x17/0x70\n ? asm_exc_invalid_op+0x1a/0x20\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n create_pending_snapshots+0x92/0xc0 [btrfs]\n btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n btrfs_mksubvol+0x301/0x4d0 [btrfs]\n btrfs_mksnapshot+0x80/0xb0 [btrfs]\n __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n btrfs_ioctl+0x8a6/0x2650 [btrfs]\n ? kmem_cache_free+0x22/0x340\n ? do_sys_openat2+0x97/0xe0\n __x64_sys_ioctl+0x97/0xd0\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n RIP: 0033:0x7fe20abe83af\n RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n </TASK>\n ---[ end trace 0000000000000000 ]---\n BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n BTRFS info (device vdc: state EA): forced readonly\n BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root's refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2024-12-19T08:44:12.208Z"}}}, "cveMetadata": {"cveId": "CVE-2024-26644", "state": "PUBLISHED", "dateUpdated": "2024-12-19T08:44:12.208Z", "dateReserved": "2024-02-19T14:20:24.138Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-26T15:17:17.614Z", "assignerShortName": "Linux"}, "dataVersion": "5.1"}

{"descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n BTRFS: Transaction aborted (error -2)\n WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n Call Trace:\n <TASK>\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? __warn+0x81/0x130\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? report_bug+0x171/0x1a0\n ? handle_bug+0x3a/0x70\n ? exc_invalid_op+0x17/0x70\n ? asm_exc_invalid_op+0x1a/0x20\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n create_pending_snapshots+0x92/0xc0 [btrfs]\n btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n btrfs_mksubvol+0x301/0x4d0 [btrfs]\n btrfs_mksnapshot+0x80/0xb0 [btrfs]\n __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n btrfs_ioctl+0x8a6/0x2650 [btrfs]\n ? kmem_cache_free+0x22/0x340\n ? do_sys_openat2+0x97/0xe0\n __x64_sys_ioctl+0x97/0xd0\n do_syscall_64+0x46/0xf0\n entry_SYSCALL_64_after_hwframe+0x6e/0x76\n RIP: 0033:0x7fe20abe83af\n RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n </TASK>\n ---[ end trace 0000000000000000 ]---\n BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n BTRFS info (device vdc: state EA): forced readonly\n BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root's refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no aborte el sistema de archivos al intentar crear una instant\u00e1nea del subvolumen eliminado. Si el descriptor del archivo fuente de la instant\u00e1nea ioctl se refiere a un subvolumen eliminado, obtenemos la siguiente cancelaci\u00f3n: BTRFS: transacci\u00f3n abortada (error -2) ADVERTENCIA: CPU: 0 PID: 833 en fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] M\u00f3dulos vinculados en: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele No contaminado 6.7.0-rc6 #2 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 01/04/2014 RIP: 0010:create_pending_snapshot +0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99 827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 00000000000000000 R09: ffffa09c01337998 R10: 000000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:000000000000 0000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Rastreo de llamadas: &lt; TAREA&gt; ? create_pending_snapshot+0x1040/0x1190 [btrfs]? __advertir+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs]? report_bug+0x171/0x1a0? handle_bug+0x3a/0x70? exc_invalid_op+0x17/0x70? asm_exc_invalid_op+0x1a/0x20? create_pending_snapshot+0x1040/0x1190 [btrfs]? create_pending_snapshot+0x1040/0x1190 [btrfs] create_pending_snapshots+0x92/0xc0 [btrfs] btrfs_commit_transaction+0x66b/0xf40 [btrfs] btrfs_mksubvol+0x301/0x4d0 [btrfs] btrfs_mksnapshot+0x8 0/0xb0 [btrfs] __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs] btrfs_ioctl_snap_create_v2+ 0xc4/0x150 [btrfs] btrfs_ioctl+0x8a6/0x2650 [btrfs] ? kmem_cache_free+0x22/0x340? do_sys_openat2+0x97/0xe0 __x64_sys_ioctl+0x97/0xd0 do_syscall_64+0x46/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7fe20abe83af RSP: 002b:00007ffe6eff13 60 EFLAGS: 00000246 ORIG_RAX: 00000000000000010 RAX: ffffffffffffffda RBX: 00000000000000004 RCX: 00007fe20abe83af RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0 R10: 0000000000000000 R11: 00 00000000000246 R12: 0000000000000000 R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58 ---[ final de seguimiento 0000000000000000 ]--- BTRFS: error ( dispositivo vdc: estado A) en create_pending_snapshot:1875: errno=-2 No existe tal entrada Informaci\u00f3n BTRFS (dispositivo vdc: estado EA): solo lectura forzada Advertencia BTRFS (dispositivo vdc: estado EA): omitir confirmaci\u00f3n de transacci\u00f3n abortada. BTRFS: error (dispositivo vdc: estado EA) en cleanup_transaction:2055: errno=-2 No existe tal entrada. Esto sucede porque create_pending_snapshot() inicializa el nuevo elemento ra\u00edz como una copia del elemento ra\u00edz de origen. Esto incluye el campo de referencias, que es 0 para un subvolumen eliminado. Por lo tanto, la llamada a btrfs_insert_root() inserta una ra\u00edz con refs == 0. btrfs_get_new_fs_root() luego encuentra la ra\u00edz y devuelve -ENOENT si refs == 0, lo que hace que create_pending_snapshot() aborte. Solucionelo verificando las referencias de la ra\u00edz de origen antes de intentar la instant\u00e1nea, pero despu\u00e9s de bloquear subvol_sem para evitar correr con la eliminaci\u00f3n."}], "id": "CVE-2024-26644", "lastModified": "2024-11-21T09:02:45.230", "metrics": {}, "published": "2024-03-26T16:15:12.137", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: btrfs: don't abort filesystem when attempting to snapshot deleted subvolume", "id": "2271644", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2271644"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-362", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbtrfs: don't abort filesystem when attempting to snapshot deleted subvolume\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\nBTRFS: Transaction aborted (error -2)\nWARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\nModules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\nCPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\nRIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\nRSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\nRAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\nRDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\nRBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\nR10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\nR13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\nFS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\nCall Trace:\n<TASK>\n? create_pending_snapshot+0x1040/0x1190 [btrfs]\n? __warn+0x81/0x130\n? create_pending_snapshot+0x1040/0x1190 [btrfs]\n? report_bug+0x171/0x1a0\n? handle_bug+0x3a/0x70\n? exc_invalid_op+0x17/0x70\n? asm_exc_invalid_op+0x1a/0x20\n? create_pending_snapshot+0x1040/0x1190 [btrfs]\n? create_pending_snapshot+0x1040/0x1190 [btrfs]\ncreate_pending_snapshots+0x92/0xc0 [btrfs]\nbtrfs_commit_transaction+0x66b/0xf40 [btrfs]\nbtrfs_mksubvol+0x301/0x4d0 [btrfs]\nbtrfs_mksnapshot+0x80/0xb0 [btrfs]\n__btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\nbtrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\nbtrfs_ioctl+0x8a6/0x2650 [btrfs]\n? kmem_cache_free+0x22/0x340\n? do_sys_openat2+0x97/0xe0\n__x64_sys_ioctl+0x97/0xd0\ndo_syscall_64+0x46/0xf0\nentry_SYSCALL_64_after_hwframe+0x6e/0x76\nRIP: 0033:0x7fe20abe83af\nRSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\nRAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\nRDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\nRBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\nR10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\nR13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n</TASK>\n---[ end trace 0000000000000000 ]---\nBTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\nBTRFS info (device vdc: state EA): forced readonly\nBTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\nBTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\nFix it by checking the source root's refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion.", "A vulnerability was found in the Btrfs filesystem implementation within the Linux kernel, where a NULL pointer dereference occurred because of create_pending_snapshot() function, attempting to initialize a new root item from a deleted subvolume's root."], "mitigation": {"lang": "en:us", "value": "Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible."}, "name": "CVE-2024-26644", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-26644\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-26644\nhttps://lore.kernel.org/linux-cve-announce/[email protected]/T"], "threat_severity": "Moderate", "upstream_fix": "kernel 5.10.210, kernel 5.15.149, kernel 6.1.76, kernel 6.6.15, kernel 6.7.3, kernel 6.8"}